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The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. Point transects were done throughout the sampling season to determine different substrate and cover types on the stream bottom.

The Changing Seasonality of Arctic Stream Systems (CSASN) did extensive arctic stream research from 2010 to 2012. Specifically, the CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and determine how these influences will shift under seasonal conditions that are likely to be substantially different in the future. Throughout the project, samples were collected from Benthic Rock Scrubs and Fine Benthic Organic Matter (FBOM).

The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. During the project, background samples were collected from four stream channels and analyzed for a variety of nutrients.

The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. There were a number of TASCC and Plateau nutrient additions at each sampling location.

The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. Whole Stream Metabolism was calculated using dissolved oxygen, discharge, stage, and temperature measured by sounds deployed in the field.

Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Water temperature and stream discharge for Kuparuk river in 2003. In recent years, a pressure transducer datalogger has measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Stage height was measured on the Kuparuk about 1 km upstream of the Dalton Highway crossing.

Stream temperature and discharge for the Kuparuk river in 2001. Each summer, water temperature and stream discharge are determined for the Kuparuk River. In recent years, dataloggers have measured stream temperature and stream height at regular intervals.

Water temperature and stream discharge were determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, dataloggers have measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Temperature was also measured on an hourly basis. Stage height was measured on the Kuparuk about 1 km above the Dalton Highway crossing.

Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Water temperature and stream discharge were determined for the Kuparuk River in 2006
. In recent years, pressure transducer dataloggers have measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Stage height was measured on the Kuparuk about 1 km above the Dalton Highway crossing.

Water temperature and stream discharge were determined for the Kuparuk River. In recent years, pressure transducer dataloggers have measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Stage height was measured on the Kuparuk about 1 km above the Dalton Highway crossing.

Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Water temperature and stream discharge were determined for the Kuparuk River. In recent years, pressure transducer dataloggers have measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Temperature was also measured on an hourly basis. Stage height was measured on the Kuparuk about 1 km above the Dalton Highway crossing.

Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Stream temperature and discharge Each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Water temperature and stream discharge were determined for the Kuparuk River. In recent years, pressure temperature dataloggers have measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Stage height was measured on the Kuparuk about 1 km above the Dalton Highway crossing.

Stream temperature and discharge Each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, dataloggers have measured stream temperature and stream height at regular intervals.

Discharge Each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Stream temperature and discharge Each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Water temperature and stream discharge were determined for the Kuparuk River. In recent years, dataloggers have measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Stage height was measured on the Kuparuk about 1 km above the Dalton Highway crossing.

Stream temperature and discharge Each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Water temperature and stream discharge were determined for the Kuparuk River in 2009. In many years, temperature and stream height were recorded manually each day. In recent years, dataloggers have measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Temperature was also measured on an hourly basis. Stage height was measured on the Kuparuk about 1 km above the Dalton Highway crossing.

Stream temperature and discharge Each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Water temperature and stream discharge were determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, dataloggers have measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Temperature was also measured on an hourly basis. Stage height was measured on the Kuparuk about 1 km above the Dalton Highway crossing.

Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Stream temperature and discharge for the Kuparuk River in 2002. Each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, dataloggers have measured stream temperature and stream height at regular intervals.

Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Stream temperature and discharge Each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Stream temperature and discharge Each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals.

Adult Arctic Grayling were caught and tagged in the Kuparuk River. A second fishing campaign occurred later in the summer, and any fish that was recaptured was remeasured to determine growth. Phosphorus addition has occurred since 1983; station sites are relative distance from the original 1983 phosphorus dripper. Stations include sites in a reference, recovery, and fertilized reach. Reaches were defined based on the location of phosphorous addition (see methods). Arctic Grayling were caught early in the field season, tagged, and recaptured late in the field season.

Since 1983, the Streams Project at the Toolik Field Station has monitored physical, chemical, and biological parameters in a 5-km, fourth-order reach of the Kuparuk River near its intersection with the Dalton Highway and the Trans-Alaska Pipeline. In 1989, similar studies were begun on a 3.5-km, third-order reach of a second stream, Oksrukuyik Creek. Fish were collected on each river. Station locations, representing kilomter values certain distances from original phosphorus dripper (see method) were noted.

Water temperature and stream discharge were determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Temperature was also measured on an hourly basis. Stage height was measured on the Kuparuk about 1 km above the Dalton Highway crossing.

Dissolved oxygen was measured in sealed chambers on representative river rocks periodically throughout the 2011 and 2012 open water season in the Kuparuk River. These data provide information on gross primary production and respiration from representative river rocks taken from 3 experimental reaches in the Kuparuk.

This file contains the consolidated data for percent cover of dominant bryophytes and other easilty idenfiable macro-algae in the experimental reaches of the Kuparuk River beginning in 1993 and updated annually. In some years percent cover was recorded more than one time per seaon. In all years percent cover was recorded in riffle habitats and in some (early) years percent cover was recorded for pool habitats. Moss point transects have been done on the Kuparuk since 1993.

Since 1983, the Streams Project at the Toolik Field Station has monitored physical, chemical, and biological parameters in a 5-km, fourth-order reach of the Kuparuk River near its intersection with the Dalton Highway and the Trans-Alaska Pipeline. In 1989, similar studies were begun on a 3.5-km, third-order reach of a second stream, Oksrukuyik Creek.

Water temperature and stream discharge were determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, dataloggers have measured stream temperature and stream height at regular intervals. A rating curve was developed to calculate continuous discharge from stage height. Temperature was also measured on an hourly basis. Stage height was measured on the Kuparuk about 1 km above the Dalton Highway crossing.

A rock-scrubbing technique was used to collect bottom samples at several different stations with three replicates at each station in the Kuparuk River. The stations are measured relative to the 1984 phosphorus dripper. Only July sampling dates are included in this file (ACG). The samples were preserved in ethanol then picked, sorted, counted, and measured in Duluth using a NIKON MICRO-PLAN II digitizing pad.

A Surber sampler (25 X 25 cm frame fitted with a 243 um mesh net) was used to sample invertebrates at several different stations. Two replicates were taken from each station. The same sampling procedure was used for all dates. The stations were measured relative to the site of the dripper ("-" = upstream of the dripper). Samples were preserved in 4% formaldehyde and transported to Orono, Maine, where invertebrates were removed by hand under 15X magnification and then identified and counted. All values are converted to individuals per square meter.

This material is based upon work supported by the National Science Foundation under Grants #DEB-1637459, 1026843, 9810222, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.